We might end up calling client_close() from start_reply(), but that
will free the fcgi/proxy bufferevent while they're still used on the
stack.
Instead, start_reply() only sets REQUEST_DONE and exits, returning the
error eventually, so callers know when to stop.
The idea is to require SCRIPT_NAME to be defined and strip it from
the beginning of the path to get PATH_INFO. Soon(tm) a `fastcgi
request strip' option will be added too. Maybe even `fastcgi script
name "path"` that sets SCRIPT_NAME automatically.
this revamps the syntax in the configuration to better match httpd(8)
(and in general be less weird) and to allow per-location fastcgi
configurations.
the bare `param' is now deprecated, but for compatibility it acts
like `fastcgi param' would do now. Same story for `fastcgi <pathÂ>'.
Listening by default on all the addresses is so bad I don't know
why I haven't changed this before. Anyway.
Add a `listen on $hostname port $port' syntax to the config file
and deprecate the old "port" and "ipv6" global setting. Still try
to honour them when no "listen on" directive is used for backward
compatibily, but this will go away in the next next version hopefully.
At the moment the `listen on' in server context don't filter the
host, i.e. one can still reach a host from a address not specified
in the corresponding `liste on', this will be added later.
it’s the QUERY_STRING decoded if it’s a search-string (i.e. not a
key-value pair.) It’s useful for scripts to avoid percent-decoding
the querystring in the most common case of a query, because in Gemini
querystrings key-value paired are not common.
Idea from a discussion with Allen Sobot.
this fixes a possible crash if `client_write' closes the connection,
because client_close can end up freeing the fastcgi bufferevent while
we're looping.
We don't support fastcgi multiplexing, so once we get an END_REQUEST
there's nothing more to do.
Prodded into looking here after a bug report from Allen Sobot, thanks!
The code in fcgi_req to send the custom params set in the config file was
placed inside the conditional for `tls_peer_cert_provided`, so the custom
parameters would not be sent if a client certificate is not provided.
FastCGI is designed to multiplex requests over a single connection, so
ideally the server can open only one connection per worker to the
FastCGI application and that's that.
Doing this kind of multiplexing makes the code harder to follow and
easier to break/leak etc on the gmid side however. OpenBSD' httpd
seems to open one connection per client, so why can't we too?
One connection per request is still way better (lighter) than using
CGI, and we can avoid all the pitfalls of the multiplexing (keeping
track of "live ids", properly shut down etc...)
This is a big change in how gmid handles I/O. Initially we used a
hand-written loop over poll(2), that then was evolved into something
powered by libevent basic API. This meant that there were a lot of
small "asynchronous" function that did one step, eventually scheduling
the re-execution, that called each others in a chain.
The new implementation revolves completely around libevent'
bufferevents. It's more clear, as everything is implemented around the
client_read and client_write functions.
There is still space for improvements, like adding timeouts for one, but
it's solid enough to be committed as is and then further improved.
This changes the fastcgi implementation from a blocking I/O to an
async implementation on top of libevent' bufferevents.
Should improve the responsiveness of gmid especially when using remote
fastcgi applications.
we need to delete the events associated with the backends, otherwise
the server process won't ever quit.
Here, we add a pending counter to every backend and shut down
immediately if they aren't handling any client; otherwise we try to
close them as soon as possible (i.e. when they close the connection to
the last connected client.)
Not production-ready yet, but it's a start.
This adds a third ``backend'' for gmid: until now there it served
local files or CGI scripts, now FastCGI applications too.
FastCGI is meant to be an improvement over CGI: instead of exec'ing a
script for every request, it allows to open a single connection to an
``application'' and send the requests/receive the responses over that
socket using a simple binary protocol.
At the moment gmid supports three different methods of opening a
fastcgi connection:
- local unix sockets, with: fastcgi "/path/to/sock"
- network sockets, with: fastcgi tcp "host" [port]
port defaults to 9000 and can be either a string or a number
- subprocess, with: fastcgi spawn "/path/to/program"
the fastcgi protocol is done over the executed program stdin
of these, the last is only for testing and may be removed in the
future.
P.S.: the fastcgi rule is per-location of course :)
Omar Polo
nytpu